Cavitaves is a clade that contain the order Leptosomatiformes (cuckoo roller) and the clade Eucavitaves (a large assemblage of birds that includes woodpeckers, kingfishers and trogons). The name refers to the fact that the majority of them nest in cavities.
Leptosomatiformes (cuckoo roller)
Bucerotiformes (hornbills and hoopoes)
Coraciiformes (rollers and kingfishers)
Piciformes (woodpeckers and toucans)